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Revenue - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Contract Balance      
Software license contracts term (in years) 1 year    
Deferred revenue $ 549   $ 529
Deferred income recognized as revenue 200 $ 180  
Operating lease revenue $ 136 $ 140